Priming device.



PRIMING DEVICE. APPLICATION FILED IUNE 30,. I9I-6.

Patented SEM. Il, 1917.

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cHaaLE-s ii.- Mossa, Jager 'criiciieog iLLiNos, VAnn FRANKLIN ence-Aar, or

ianLoIr; Wisconsin; AssiGNoas To'FAiaBANKs, Mensur@ co., or cHIoAGo, ILLI- i llivers, .el coaroiaiirioiv' or iLLiNoIs.

PREMING- DEVICE.

Specification of Letters Patent. Patnted 11 .191 L Originalapplication .filed October 22, 1915, Serial No. 57,314. Divided and this application filed .Tune 30, l 1916. Serial No. 106,756. i

Cook and State of Illinois, and FRANKLIN G. Horam, residing at'Beloit, in the county of Rock and State of Wisconsin, both citizens of the UnitedA States of America, have invented a certainnew and useful improvementY in Priming Devices, of which the following'is a specication.

Our invention relates to priming devices of the type commonly used 'in connection with internal combustion engines. quite common, where internal combustion engines operateV upon comparatively heavy oil, such as kerosene, to start the engine upon a lighter 'and more highly volatile j liquid, such as gasolene.

`ject of the invention is to provide simple The general obandl efficient means whereby the engine can'vbhe; started on the lighter liquid and a heavier liquid may be afterward substi tuted. jCont'ributorylto the general obyect',

it isfone'of the purposes of the invention to provide ine-ans whereby the fuel reservoir, which supplies the liquid to the carbureter, may be drained and the contents run back into the regular overflow pipe preliminary to refilling with a lighter stai-ting liquid. Anothercontributing purpose of the invention vto provide means whereby it becomes possible to dispense with a stuiiing box for v the valverwhich controls the flow fromu the reservoir tothe drain pipe. These objects are accomplished by the mechanism illustrated in the ,accompanying drawings in which 'Y Figure 1 is a vertical'section of the reservoir and associated parts taken through the center of the hollow valve or plug which controls the'ilo'w to the drain pipe.

Fig. :2 is a top View of the reservoir and rassociated parts.

T he fuel pump and other parts shown in 4'these Adrawings forni the subject of a copei'iding application, filed by us October 22,

' 1915, Serial No. 57,314.

Referring to the accompanying drawing in which like reference numerals denote like partsin both views, the reservoir 1 is constantly supplied with liquid fuel by means of apu'm'py, which, in the present case, has

'a cylinder 2 provided with a plunger 3.

It is The plunger is hollow and is provided with a check valve dat the lower end. The plunger rests upon a compression spring 5, and a check valve 6 is provided atA the lower end of the cylinder. The plunger has a delivery port 7, which discharges into the resvoir an amount of liquid fuel somewhat iin excess of the amount required by the engine At the bottom of the reservoir 1 is a valve seat 10, located at the upper end of a drain pipe 11, which conducts "the surplus liqui-d back to the source of supply, wliereitwi'llv subsequently v'be ire-pumped into the `reservoir. a valve which consists of la tube 12,haviiig a constant level aperture 13 nearits upper end at the point where the liquid 4level isto be maintained. The lower edge of this aperture may beregarded as a darn or weir or.

an overflow fordetermining the level of the fuel. At tlieupper end this tube, which, for convenience, may be referred to as a hollow plug,7 is a threaded stem 14',which screws into the top of the reservoir and is rotated by a knurled head 15.

The reservoir is provided with a cover 16 for closing at the top, and this is yieldingly held 'in place by ,an overlying helical spring 17, which encircles the stein 14C and is retained by the head 15 which overlies it.

rlhe fuel passes from the reservoir into the engine through a vapor-tubel 18, see Fig. 2, and the rate ofv flow into this tube from the reservoir is controlled by a 'needle valve 19, mounted in the reservoir approximately at the level of the aperture 13.

In operation, the plug 12 normally remains closed, that is, seated upon the valve seat 10. The fuel pump supplies liquid to the reservoir at a rate somewhat in excess of the requirements of the engine, and t-he surplus liquid flows through the aperture 13 into the hollow plug and throughy said plug past the 'valve seat and into the drain `pipe 11. Thus, the level of the liquid iii the reservoir remains constant and the surplus overllows into'the pipe 11. Let .it be assumed that the engine has not been running for Cooperating with the valve' seatfjis sometime and is therefore cold and had previously been ruiming on kerosene or other comparatively heavy liquid. Under these conditions, when it is desired to start up, the attendant first rotates the head in adirection to cause the hollow plug l2 to rise from its seat 10, thus permitting the liquid in the reservoir to flow down into the drain pipe l1. As soon as the reservoir has been drained, the operator or the attendant screws the hollow plug down again to its seat and then pours gasoene, or other highly volatile fluid into the reservoir from. the top. He then starts up theengine, which, being now supplied with highly volatile liquid, will 'be able to keep itself going until it has become hot enouorh` to maintain its speed when supplied wifh the heavier liquid. When this time comes the attendant ermits the pump to deliver the heavier iquid to the .reservoir and the engine thereaftercontinues to operate upon it. It will be observed that 1n our device a `angle pipe 11 serves both as an overflow pipe for taking care of the surplus` l1qu1d and as a drain pipe through which the reservoir may be emptied preparatory t0 refilling vwith lighter starting liquid. It will also be noted that `the hollow plug is su ported from a part of the reservoir, whie is always above the level of the liquid, and hence there is no possibility of leakage and no stufling boX is required. Furthermore, the device is of very simple construction for the hollow plug may be, and preferably is, made of a single piece with the stem 14 and head 15, and -th1s combination element screws directly into the reservoir. l

' Attention is directed to the fact that this 40 application is a division of our original application, filed October 22nd, 1915, Serial Number57,314.

We claim as our invention: i

1. A reservoir for liquid fuel having means for supplying a surplus of fuel to the reservoir, an overflow fixing the fuel level,

a drain opening into the lower portion of the reservoir adapted when open to lower lflow opening in it for fixing the level of the te.

"vation for delivery to said delivery duct Hfuel and maintaining. it at the proper eleand means for opening and closing sai valve,

3. A reservoir for liquid fuel, said reser- (,'Sypir having means for supplying a surplus of fuel, a delivery duct for delivering the fuel to Ian internal combustion engine, said reservoir having a drain opening near the bottomT a valve for closing said opening, said valve consisting of a vertical tube movablertoward and from the drain opening, said tube having an overflow opening in it for fixing the level' of the fuel at the proper elevation for said delivery duct, and means for opening and closing said valve consisting of -a thread on the outside of the tube working through a tapped hole in a part rigid with the reservoir and a handle for rotating said valve.

l. A, priming device for internal combustion engines comprising a reservoir having van inlet for supplying liquid fuel thereto,

an outlet for conducting the fuel from the.

reservoir to the engine, a drain pipe separate from the inlet and outlet lfor carrymg away surplus fuel, atube in the reservoir communicating directly with the drain pipe, sothat` when the tube is in closed po sition fuel cannot flow directly from the reservoir tothe drain pipe, said tube having an opening above the mouth of the drain p1pe whereby the fuel may be maintained at a constant level in said reservoir, `,and the surplus fuel conducted off into the drain plpe, said tube being movable away from the mouth of the drain pipe to permit the fuel, which may be of relatively low grade, to be drainedofl' and, after the tube is returned totclosed position, a more volatile fuel to be substituted.

6. A reservoir for liquid fuel, having. means forsupplying a surplus of fuel to `the reservoir, an overflow fixing the fuel level, a drain opening in the lower ortion of the reservoir,4 a waste duct, sai drain and said overflow connecting to said waste duct, anda valve controlling said drain, said valve having an operating stem projecting above the liquid whereby no stuffing box is required to prevent leakage around the valve operating stem.

7. A reservoir for liquid fuel, said reservoir having an outlet leading to an internal combustion engine, means for supplying a surplus of fuel to the reservoir, a valve seat near the bottom of said reservoir, a valve cooperating with said seat, said valve cous1sting of a vertical tube having an opening in the side for fixing the liquid level,

and means for opening and closing Said valve for the pui-pimx described.

b. A reeervoir for liquid fuel, said reservoir having an outlet leading to an internal Combustion engine`r means for supplying a surplus of liquid fuel to the reservoir, said reservoir having a drain opening near the bottom guarded by an angular valve Seat, a valve cooperating with said seat and con- Sistine,` of a vertical tube having an overflow opening for fixing -the liquid level in the reservoir, means -for opening and closing said valve, @Quei-sting in a thread formed on the outside of the tube and working through a tapped hole in a part rigid with the reservoir, and a handle for rotating said walve.

9. A reservoir for supplying liquid fuel to an internal combustion engine, said reservoir having a deliveryduot for delivering the fuel to the engine7 means for supplying a surplus of fuel to the 1'eser.voir,"a weir or dam over which the surplus; fuel Hows, said weir or dani thereby maintaining the level 0f the fuel in the reservoir constant` and at a proper ele vation for supplying said deliveryv duct, a" second duet for conveying frein the weir or dam the fuel liowine over it, a third duet opening out of the lower portion of the reservoir, said second and third duetel eonnnunicatine with each other, and a valve for openingr and Closing Said third duet to thereby determine whether the reservoir shall be drained or the level 1naintained at a height suitable for supplying the delivery duct.

10. A reeervoir for liquid fuel havingay deliver)r duct for delivering to lan internal combustion engine, means for Supplying a surplus of fuel to the reservoir` a dani or weir over which the surplusI fuel flows, whereby a proper level is maintained for supplying the delivery duct, the reservoir having a drain opening in the lower portion adapted, when open, to lower the level of the fuel below the top of the dani or,

weir, a waste duct, said dam or woir and said drain both eoinniunieatiug with said waste duet, and a valve controlling said drain.

I n witness whereof ,we have hereunto subscribed our naines.

CHARLES H. MOR-SE, JR. FRANKLIN G. HOBART. 

